Advanced Google Adwords - An in-depth look at using AdWords effectively
Salesflare - Simply powerful CRM. Automates your data to build better relationships and make more sales.
AdNabu - AdNabu is a Google Ads PPC automation software.
Followup.cc - FollowUp for email is a lightweight productivity suite that keeps your conversations and tasks from slipping through the cracks. Set perfectly timed reminders that arrive at the top of your inbox, right when you need them.
Opteo - Opteo searches for statistically significant patterns in an account and creates "optimization tasks" to improve account performance.
Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.